Variable-speed mechanism.



I A. L; DE LEBUW. VARIABLE SPEED MECHANISM; APPLICATION FILED OOT.7, 1907.

91 1,951. Patented Feb. 9, 1909.

UNITED STATES PATENT OFFICE.

ADOLPH L. on LEEUW; OFBAMILTQN; OHIO, AssIGNoRf'ro THE CINCINNATI MILLING MA cHINE COMPANY, QEOINCINNATI, 03110, A OORPORATTON.

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Specification of Letters Patent.

Patented Feb. 9, 1909.

Application filed October 7, 1907. ass... 896,289.

Told/ll whom it ma /yv concern: Bei-tknown that-LADOLPH L. DE LEEUW, a. citizen of the United States, residing at Hamilton, in thecounty ,of Butler andv State of Ohio, have; invented certain new and use-, ful Improvements in Variable-Speed Mech anism, of which the following is a specification. Y

My invention relates to a variable speed de vice', primarily designed to form the main driveofa milling machine, but applicable in its principles to the various: usesof devices of this character..

v The object of the invention is to provide a. variable speed device which will act as a compounder for a primary speed device of the cone andtumbler' type, and preferably dlsposed between. the cone and tumbler system and the spindle As this comipounder is therefore disposed in the main, ame of the'machi'ne in a position where there is but little available space, one of the features of lmportance is to get as many speeds. as possi ble in a space as compact as possible, with the fewest possibleparts, and of such strength and simplicity as will stand the heavy strains of machine tool work, and also be chea in construction. To this end I interpose etween the coneshaft and s indle, gearing and clutch mechanism adapte to be alternately engaged with tWo different members bf the cone, whereby two direct and two back gearing drives may be taken from the 'cone to the spindle, so that my compounder aggregates four times the speeds of the cone.

The features of my invention will be more fully set forth 'in the description of the accompanying drawings forming apart of this speclfication, in which:. j

Figure 1 is acentral vertical section Fig. 2 is a section on Fig. 3 is a front elevation of line as, m, Fig. 1.

shifting the the device for simultaneously gearand clutch.

1 represents theframe. I

2 represents the tumbler'shaft on the end of which is the primary driving device 3.

ireprsents t e usual tumbling gear constructlon on shaft 2 within the frame.

5 represents the cone shaft carrying the usual cone 6 showing four steps adapted to be selectively engaged by the tumbler 4.

' 7 represents the spindle, and 8 represents the overhanging arm.

9 represents a sleeve loose on the spindle 7.

10representsa sleeve adapted to turnwith and slideon sleeve 9.

11 12, represent gearsfixed t0 sleeve 10. 13 represents a second sleeve adapted to turn with and slide on sleeve 9-.

14 represents a gear fixed tosleeve 13 and having aclutch face 15 adapted to engage with its cooperating clutch face 16- formed on in Fig. 1, gear 11 is intermes ed with cone gear 21, driving sleeves 9, 10 and 13, and through gears 14, 19, 20 and 17 driving the s indle 7', this b'eing what I call a back gear rive; The sleeves I3 and 18-are connected by a yoke lever 22, operated by a rock shaft and crank 23, to simultaneously shift the sleeves in opposite directions. When this crank 23 is operated to shift these sleeves to the reverse of the osition shown in Fig. 1, the gears 14 and 1. -willbe', disengaged from ears 19, 20, andthe sleeve 13 will be clutched irectly to the gear 17, thus constituting what I call a direct drive from the cone to the spindle. It will also be noted that the arm of lever 22 operating gears 19 and 20 is greater in length than the arm operating the sleeve 13, the function of whichis that the ear 20 moves out of mesh with gear 17 before the clutch teeth 15 are engaged with the clutch teeth 16 and vice versa. This is necessary to avoid damage to the parts. The sleeve 10 may be shifted to the left, disengaging gears 11 and 21, and engaging gear 12 with the gear 24 of the cone, and in this position thelever 23 may be again 0 erated to transmit a direct and, a back-gear rive from the cone to the spindle. These compound; ing operations are efiected by the man pula tion of two levers.

It isto be understood that where the motion is transmitted from the cone to a gear on the driven shaft or spindle, and this gear is clutched or fixed to the driven shaft or sp dle for convenience of differentiation, I erm this a direct drive; and where the motion from the cone is transmitted to a loose gear on the driven shaft or spindle and thence back ,to a loose gear on the cone shaft, and then to a gear clutched or fixed to this driven shaft or spindle, the ultimateresult is a compound speed efiect which I term back gearing,

With my invention this combination of shaft, and a driven shaft, two independently sliding gears loose on the driven shaft but in driving connection with each other, means for connecting said sliding gears to the driven shaft, and means for throwing the loose gears into the train when the sliding gear is dis connected from the driven shaft, substantially as described. 2. In a variable speed device, a cone and tumbler gear system and a driven shaft, gear, clutch and shifting mechanism disposed on the cone and driven shafts, whereby a direct and back gear drive may be taken for each step of the cone, substantially as described. 3. In a variable speed device, a cone and tumbler gear system and a driven shaft, loose gears on the cone shaft, sliding gears for alternately engaging two members of the cone, means for connecting the sliding gears to the driven shaft, and means for bringing said loose gears into train between the sliding gears and the driven shaft, substantially as described.

r 4. In avariable speed device, a first shaft.

for alternately engaging two members of saidcone of gears, a second sliding gearon the second shaft in driven connection with the first named sliding gears, a gear fixed on the second shaft, and a compound gear on the first shaft, and means for throwing said second slidin gear into alternate driving relation with sai compound gear and fixed gear, substantially as described. 7

5. In a variable speed device, a cone and tumbler gear system and a driven shaft, two sets of sliding gears in driving relation with each other, independently slidable, one set of sliding gears alternately engaging two members of the cone, a gear fixed on said driven shaft, adapted to be clutched with one of said sliding gears, substantially as described.

6. In a variable speed device, a cone and tumbler gear system, and a driven shaft, two

sets of sliding gears in driving relation with each other, independently slidable, one set of sliding gears alternately engaging two members of the cone, a gear fixed on said driven shaft adapted to be clutched with the second sliding gear, a com ound gear on the cone shaft, slidable simu taneous with one of the sliding gears on the driven shaft, whereby an alternate direct and back gear drive may be had between the sliding and fixed gear on the driven shaft, substantially as described.

In testimony whereof, I have hereunto set my hand.

, ADOLPH L. DE LEEUVV.

Witnesses:

OLIvER B. KAISER, LEO ODoNNnLL. 

